Claude Opus 4.5 vs Grok-3 Mini: Specs & Benchmark Comparison
| Characteristic | Claude Opus 4.5 | Grok-3 Mini |
|---|---|---|
| Company | Anthropic | xAI |
| Release Date | November 23, 2025 | February 16, 2025 |
| Parameters | — | — |
| Multimodal | Yes | Yes |
| Context (input) | 200K | 128K |
| Context (output) | 64K | 8K |
| Input Price / 1M | $5.00 | $0.30 |
| Output Price / 1M | $25.00 | $0.50 |
| Average Score | 0.9 | 0.9 |
| Benchmarks | ||
| GPQA | 0.9 | 0.8 |
Visual Benchmark Comparison
Claude Opus 4.5
Grok-3 Mini
GPQA0.9 vs 0.8
0.9
0.8
Verdict
Claude Opus 4.5 leads in 2 out of 4 comparison categories.
Overall Performance
Both models show comparable average scores: Claude Opus 4.5 — 0.9, Grok-3 Mini — 0.9.
API Cost
Grok-3 Mini is 37.5x cheaper: input $0.30/1M vs $5.00/1M tokens.
Context Window
Claude Opus 4.5 supports a larger context: 200K vs 128K tokens.
Recency
Claude Opus 4.5 is newer: released 11/23/2025 vs 2/16/2025.
More About These Models
Related Comparisons
The Claude Opus 4.5 and Grok-3 Mini comparison is updated for 2026. Data includes benchmark results, API pricing, context window size and other specifications. For more detailed information, visit the Claude Opus 4.5 or Grok-3 Mini page. See also the complete list of AI model comparisons.